Abstract
Background
Understanding the acute effects of inspiratory muscle training (IMT) at different intensities on the autonomic nervous system, arterial stiffness, and blood pressure in healthy young people will be important in the constitution of appropriate IMT prescriptions.
Aims
To investigate the acute effects of IMT at different intensities on autonomic function, arterial stiffness, and blood pressure in healthy young people
Methods
Thirty-six healthy participants were enrolled in this crossover study. All participants randomly performed IMT sessions, which consisted of diaphragmatic breathing exercise (DBE), 10%, 30%, and 60% of maximal inspiratory pressure (MIP) on consecutive days. Autonomic function and arterial stiffness were assessed by measuring heart rate variability (HRV) and aortic pulse wave velocity (AoPWV), respectively. HRV, AoPWV, and blood pressure were recorded before and immediately after each IMT session.
Results
There was no significant difference in the baseline measurements between IMT sessions (p > 0.05). Heart rate (HR) significantly decreased after DBE and IMT at 10% of MIP (p < 0.05). All time domain parameters of HRV significantly improved after DBE compared with the baseline (p < 0.05). There was no difference in the frequency domain of HRV after the IMT sessions (p > 0.05). AoPWV significantly increased after IMT at 60% of MIP (p < 0.05). Mean arterial pressure significantly changed after DBE and IMT at 60% of MIP (p < 0.05).
Conclusions
A single session of DBE positively affects autonomic function and blood pressure, while IMT at 60% of MIP increases arterial stiffness. The different intensities of IMT have various impacts on autonomic function, arterial stiffness, and blood pressure.
Trial registration
NCT03788356
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Change history
09 September 2020
A Correction to this paper has been published: https://doi.org/10.1007/s11845-020-02363-8
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Acknowledgments
The authors thank Turhan Kahraman for statistical analysis support.
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Conception and design: Aylin Tanriverdi, Buse Ozcan Kahraman, Ismail Ozsoy, Ebru Ozpelit, Sema Savci; data collection: Aylin Tanriverdi, Buse Ozcan Kahraman, Ebru Ozpelit; statistical analyses: Aylin Tanriverdi, Buse Ozcan Kahraman, Ismail Ozsoy; writing of the manuscript: Aylin Tanriverdi, Sema Savci; revising the article for important intellectual content and final approval: all authors
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This study conformed in accordance with the 2013 Declaration of Helsinki (study was not registered in a database). The study protocol was approved by the Ethics Committee of Dokuz Eylül University (reference number 2018/14-16).
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The original version of this article was revised: This article was published online with an error. In Table 3, the name of the variable in the last row is missing. It just says 'mmHg'. The name to be written is ‘MAP (mmHg)’.
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Tanriverdi, A., Kahraman, B.O., Ozsoy, I. et al. Acute effects of inspiratory muscle training at different intensities in healthy young people. Ir J Med Sci 190, 577–585 (2021). https://doi.org/10.1007/s11845-020-02353-w
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DOI: https://doi.org/10.1007/s11845-020-02353-w